Vertical steam boiler



DGC. 22 H. E. WALLIS VERTICAL STEAM BOILER Filed May 29, 1922 m. m w m ATTORNEY.

Patented Dec. 22, 1925.

UNITED STATES 1,566,561 PATENT. OFFICE. 1

HENRY E. WALLIS, or CHICAGO, ILLINOIS, ASSIGNOR or ONE-THIRD TO A. e. BUSH, or

' o navnnrore'r. IOWA. I j I VERTICAL STEAM BOILER.

Application filed May 29, 1922. Serial No. 564,548.

To all whom it may concern: I

Be it known that HENRY E. VVALLIS, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, has invented certain new and useful Improvements in Vertical Steam Boilers, of which the followin is a specification.

My invention re ates to improvements in steam boilers of the vertical type in which the upper section of the inner shell comprises a cone frustum secured at its upper end to the top plate of the boiler and at its lower end to'a cylindrical inner shell forming a part of the water leg of the boiler.

The objects of my invention are to provide means for re-enforcing the inner shell of the boiler against distortion, crushing or rupture by the pressure of the steam within the boiler, without interfering with the circulation of the water on the inner shell.

I attain these obj ects'by the mechanism illustrated in the accompanyingdrawings, in which,-

Figure 1 is a vertical section of a tubular boiler embodying my invention, on the middle line of the boiler; Fig. 2 is a cross section on the line 22 of Fi ure 1; Fig. 3' is a top or plan view of the sklrt sheet but for clearness most of the staybolts are omitted; Fig. 4 is a side elevation of the skirt sheet showing part of the sheet broken away to disclose the position of the staybolts on the inside thereof.

Similar numerals refer to similar parts throughout the several views.

The boiler consists of an external shell, 1, of cylindrical form, with a top plate, 5, riveted thereto by rivets, 22.

The inner shell of the boiler comprises a cylindrical section, 11, at the lower end connected to the outer shell and secured to the outer shell of the boiler by rivets, 12, in the ordinary form of an ogee joint. The cylindrical portion of the inner shell surrounds the fire box andais provided with the ordinary fire door, 7, for feeding fuel into the boiler with ash pit, 9, for the removal of ashes, etc.

At the upper end of the cylindrical section of the inner shell, a conical section, 3, is riveted by rivets, 13, and the upper end of the conical section extends upward and is secured to a circular flange in the center of the top plate of the boiler by rivets, 23, i rd y man er.-

shell in the usual well-known manner.

A smoke stack, vll, is secured to the upper end of the conical section of the inner shell.

A skirt sheet, 2, is secured in position around the conical-section of the inner shell by staybolts, 4, which are riveted to the skirt sheet and to the conical section of the inner A spacer, 6, is secured at the upper end of the skirt sheet by lock nuts, 6 and 6", to adjust the position of the skirt sheet before riveting the staybolts, 4:. i

In the ordinary practice, with vertical boilers of certain sizes, boiler insurance companies and inspection departments of'various States, require the inner shell'to be reenforced and secured to the outershell by staybolts, but in the form of boiler to which my invention is applicable, it is diflicult to securethe staybolts to 'the'innerandouter shells on account of the anglefat which the conical section of the inner shell stands with reference to the outershell and it is also difficult to pass the staybolts through the skirt sheet because it is difficult to punch the necessary holes in the skirt sheet with sufiicient accuracy to lace the stayboltstherein and because if 1; e holes are enlarged to make it easy to pass the staybolts through the holes, the holes will-also permit the passage of water and interfere with the desired circulation and becausethecirculation of air and steam is likely to cause considerable rattling of the staybolts upon the skirt sheet.

In my device, the skirt sheet, 2, is preferably formed of plates materially heavier than the inner shell of the boiler .and being connected with the inner shell by the staybolts, 4, will re-enforce and strengthen the inner shell not only by the direct application of the strength of the skirt sheet, but also by the truss comprised of a vertical row of staybolts and the portion of the skirt sheet and inner shell adjacent thereto.

In my device, the skirt sheet may be formed of steel plate heavy enough by its own strength to furnish the required re-enforcement of the inner shell or the skirt sheet may, be made in a plurality of vertical sections each section being flanged outwardly as shown at 2 in Figure 3, and the sections secured together by bolting the adjacent flanges, 2, together with bolts 2", so that the flanges, 2, will strengthen and re-enforce the. skirt sheet against distortion inwardly. The skirt sheet, may also be strengthened by corrugat' in g it,;:by adc l'ing reenlorcing members or any 02E the other well-known methods of strengthening without departing from the spirit of my invention.

' In Figures 2, 3 and t, for clearness I have only shown a portion of the staybolts, but it will be readily understood that the-yare to be placed in rows vertically and horizontally and to be spaced at suchintervials :and to be of such sizes as may be necessary to afl'ord the required re-enforcement.

Ibis-obvious thatthe precise form, dimensio'ns' number and arrangement of the parts of. my re-en-torcing. device may be varied to suitthe requirements of each particular case.

It is also obvious that 'mygdevice be used to rc-enforce cylindrical inner shell as well as a conical one and :that when so used, the skirt sheet should be cylindricalso as to be parallel with the cylindrical inner shell.

'It'is-obvions that my invention isapplicable not only 'to steam boilers, but to any closed form of apparatusintended to contain fluids-under pressure whereit'is necessary to re-enforce the Inner shell against rupture from internal pressure.

I claim: 7

1'. In a steam boiler of the verticaltype, the combination with :a section of the inner. shell in the form "of a cone frnstu-m, of a skirt sheet ofcorresponding formsecured position around such portion of the .inner shell at a uniform distance, a- =p'liiira'li-ty of longitudinal flanges formed upon the skirt sheet and formingstifi'eningand strengthening :ribs therefor, and sta-ybol'ts securing the skirt sheet to the inner shell and which ccoperate with the skirts'heetto reinforce the inner shell.

2. In a"re1'nforcing' device for vertical .at a suitable distance therefrom, and which co-operate with the skirt sheet to reinforce the inner shell.

3. A vertical steam boiler comprising an outer shell, an innershell ot-upper and'lower partsssuitably secured thereto, the lowerpart of the inner shell being cylindrical in form andthe upper part :being in the 01m of a cone frustum, a skirt sheet comprising a plurality of vertically flanged sections with the adjacent flanges suitably unit d, said skirt sheet beinglarger than'theconicalsection of the inner shell and secured around the conical section of the inner shell with staybolts uniting the conical section of: the inner shell andthe skirt sheet ina fixed relative position.

i. A vertical steam boiler comprising an outer shell, an inner shell'of upper and lower parts suitably secured thereto, the lower part of the inner shell being cylindrical in form and the upper part being in the form of a cone frustum, a skirt sheet comprising a plurality of sections with downwardly-extending .fianges with the adjacent flanges suitably united, said skirt sheet being larger than the conical section of the inner shell and secured around the conical section vof the inner shell, withstaylcolts uniting the conical section of the inner shell and the skirt sheet in a fixed relative position.

.In testimony wher-eof, he aflixes, his signature;

'HENRY E. WALLIS. 

